Subtract 90/72 from 30/15
1st number: 2 0/15, 2nd number: 1 18/72
30/15 - 90/72 is 3/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 15 × 24 = 360,
30/15 = 30 × 24/15 × 24 = 720/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
90/72 = 90 × 5/72 × 5 = 450/360 - Subtract the two like fractions:
720/360 - 450/360 = 720 - 450/360 = 270/360 - After reducing the fraction, the answer is 3/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/15-90/72 90/15-90/72 30/45-90/72 30/75-90/72